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Java > Open Source Codes > org > objectstyle > cayenne > query > QualifiedQuery


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56 package org.objectstyle.cayenne.query;
57
58 import org.objectstyle.cayenne.exp.Expression;
59
60 /**
61  * An abstract superclass of queries with Expression qualifiers.
62  *
63  * @author Andrei Adamchik
64  */
65 public abstract class QualifiedQuery extends AbstractQuery {
66
67     protected Expression qualifier;
68
69     /**
70      * Sets new query qualifier.
71      */
72     public void setQualifier(Expression qualifier) {
73         this.qualifier = qualifier;
74     }
75
76     /**
77      * Returns query qualifier.
78      */
79     public Expression getQualifier() {
80         return qualifier;
81     }
82
83     /**
84      * Adds specified qualifier to the existing qualifier joining it using "AND".
85      */
86     public void andQualifier(Expression e) {
87         qualifier = (qualifier != null) ? qualifier.andExp(e) : e;
88     }
89
90     /**
91      * Adds specified qualifier to the existing qualifier joining it using "OR".
92      */
93     public void orQualifier(Expression e) {
94         qualifier = (qualifier != null) ? qualifier.orExp(e) : e;
95     }
96 }
97
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